Can't resolve occ.com.mx

[Mónica Soto Valencia]

Hello, I have some problems with my dns servers when I try to resolve
occ.com.mx, sometimes it resolve it well and sometimes doesn't. When I use
dig sometimes I got the following errors:
 
dig  @200.10.243.45 occ.com.mx MX
;; Warning: ID mismatch: expected ID 23002, got 16756
;; Warning: ID mismatch: expected ID 23002, got 16756
;; Warning: ID mismatch: expected ID 23002, got 16756
 
; <<>> DiG 9.3.2-P1 <<>> @200.10.243.45 occ.com.mx MX
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 23002
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
 
;; QUESTION SECTION:
;occ.com.mx.                    IN      MX
 
;; Query time: 297 msec
;; SERVER: 200.10.243.45#53(200.10.243.45)
;; WHEN: Thu Sep 13 13:29:37 2007
;; MSG SIZE  rcvd: 28
dig  @200.10.243.45 occ.com.mx MX
 
; <<>> DiG 9.3.2-P1 <<>> @200.10.243.45 occ.com.mx MX
; (1 server found)
;; global options:  printcmd
;; connection timed out; no servers could be reached

 
When I use dig using +trace I succesfully reach the server:
 
dig +trace @200.10.243.45 occ.com.mx MX
 
; <<>> DiG 9.3.2-P1 <<>> +trace @200.10.243.45 occ.com.mx MX
; (1 server found)
;; global options:  printcmd
.                       426427  IN      NS      M.ROOT-SERVERS.NET.
.                       426427  IN      NS      A.ROOT-SERVERS.NET.
.                       426427  IN      NS      B.ROOT-SERVERS.NET.
.                       426427  IN      NS      C.ROOT-SERVERS.NET.
.                       426427  IN      NS      D.ROOT-SERVERS.NET.
.                       426427  IN      NS      E.ROOT-SERVERS.NET.
.                       426427  IN      NS      F.ROOT-SERVERS.NET.
.                       426427  IN      NS      G.ROOT-SERVERS.NET.
.                       426427  IN      NS      H.ROOT-SERVERS.NET.
.                       426427  IN      NS      I.ROOT-SERVERS.NET.
.                       426427  IN      NS      J.ROOT-SERVERS.NET.
.                       426427  IN      NS      K.ROOT-SERVERS.NET.
.                       426427  IN      NS      L.ROOT-SERVERS.NET.
;; Received 356 bytes from 200.10.243.45#53(200.10.243.45) in 1 ms
 
mx.                     172800  IN      NS      B.NS.mx.
mx.                     172800  IN      NS      C.NS.mx.
mx.                     172800  IN      NS      D.NS.mx.
mx.                     172800  IN      NS      A.NS.mx.
;; Received 159 bytes from 198.41.0.4#53(A.ROOT-SERVERS.NET) in 72 ms
 
occ.com.mx.             86400   IN      NS      ns1.occmx.com.
;; Received 55 bytes from 200.23.179.1#53(B.NS.mx) in 8 ms
 
occ.com.mx.             180     IN      MX      10 mail.occ.com.mx.
;; Received 59 bytes from 207.250.79.50#53(ns1.occmx.com) in 85 ms

 
Does anyone know what could be the problem??. I am using BIND 9.3.4-P1 whit
Red Hat 4.0 Enterprise.
 
I'll appreciate your help!!.
 
Regards
 
______________________
Mónica Soto Valencia
Comunicación y Sistemas
Universidad La Salle
52789500 xt. 1068